Steam-boiler.



O. A. HAMMEL.

STEAM BOILER.

VAPPLIOATION FILED AUG. 4,

Patente Oct 18, 1910.

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G A. HAMMEL.

STEAM BOILER.

APPLICATION FILED AUGA, 1909.

1%. 3. Patented Got. 18, 1910.

* emceenemas A. Hammer, or Los antennas. CALIFORNIA.

STEAM-BOILER.

Specification of Letters Patent.

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fatented oct. is, one.

Application filed August 4, 1999. Serial No. 511,080.

To oZZ whom it may concern:

Be it known that l, CHARLES A. HA MEL,

. a citizen of the United States, residing at Los Angeles, in the county of Los Angelc s and State .of California, have invented men" and useful Improvements in-Steani-Boilers, of Which the following is a specification.

My invention has relation to constructive improvements in those. type of boilers. such as are illustrated and described in my ll. t

Letters Patent No. 882,756 entitled ()il burning steam boilers, and granted to me on the Jlth day of'lvlarch, 1908.

In the above mentioned patent the hydroearbon-burners were oppositely disposed, delivering their flames toward each other and having a single air admission means, while in this improved construction the burners are disposed so as to deliver their flames in 'the same general direction, thus enabling an operator to effectively control the heat generated thereby.

A main and important object of this invention is teal-range a novel disposition of the burners. whereby the inaxinuun heat generated thereby'will be directed to and absorbed by the rear portion of the boiler capable of operation independently of the other.

in the aceomplishment oi the above objects I preferably employ a plurality of burners, disposed so as to deliver their flames in the same general direction with out injury to each other, each being provided with 'an' independent air admission means and a control means therefor.

' in the annexed drawings forming a part of this specification, Figure 1* is central longitudinal section through the firebox of a locomotive boiler, illustrating an application of my invention. Fig. Q- is a transverse View taken on line 2+2 of Fig. 1. Fig. 3-- is a central longitudinal section of a locomo tive boiler illustrating a modified form of which my invention. Fig. is'a transverse view ta renfon line 3% of Fig. 3.

Referringimore particularly to the lra\\*- ings, the inside firebox or combustion chamber 5 is of the'usual type, being closed at the by a top by crouin'sheet 6 and surrounded water jacket 7, the bottom of'which closed by the usual mud ring 8. The outside shell 5) of the firebox is connected to the Waist 10,

through which the tubes 11' pass from the;

tube sheet 12 to the smoke stack (not shown) at the front end of the boiler. Chamber 5 is closed at the bottom by a sheet or plate metal box,'and corresponds in general form to the ash pan of locomotive boilers in which fuel of a solid type is consumed. 130x13 is provided with a metallic bottom plate let which extends from the rear'end of the firebox for wardlly approximately one third of the length thereof, where it is bolted or otherwise sliured to a vertically disposed plate 15 forms'a l'3ridge-16. Plate 17 which is bolted or otherwise secured to vertical plate 15 tornisa closure for that part of the firebox,

that lies beyond plate M. Plates 14 and. 17 are provided withrectangular openings 18,

19, over which are mounted perforated cast ings 20 and 21, the upper faces of these castings lie flush Withthe top faces of the fire brick 22 with which the box 13 is preferably lined.

Secured to the under face of plates 14: and

.17 are sheet. metal air inlet. boxes 23, 24, the rear vertlca'l Wall of each box being open to the atmosphere; and each provided witha damper 25, controlled from the cab of the engine in a suitable manner (not shown). By means ofthese air inlet boxes the admission of air through the perforated caste. ings into the firebox may be satisfactorily and etticicntly (,OlllflOllOtl. This method of taking the main air supply from the bottom through perforated castings is essentially the same in all respects as that construction de scribed and illustratedin my heretofore 1nent'ioned patent, it preventing, as in that construction, the entrance of an excessn e or undue amount or cold air to the COl'llbllStlOL chamber, and at, the same time retards the volume of an entering thereinto and enables the fireman of the locomotive to control the admission of air to the combustion chamber most ctl'ectively. The air as it enters through the perforations becomes-highly heated from the operation of the burners and expands Xtends upwardly from plate 14 and.

. combustion chamber.

of this construction, as I am enabled to concentrate the heat pro-. duced by the flames of. the burners in the that. it will readily foifm a union with the gases that are being consumed within the The entrance of air through the perforations in the bottom plates .also tends to raise the burner flames and prevents dragging. It will be noted by an inspection of Fig.1 of thedrawings that the bulk of the air admitted to the combustion chamber is through inlet box 23, the inlet box 241T disposed under the flame project: ed by the forward burner being barely sufficient to supply that fiame with therequisite amount of oxygen to start combustion.

"lhe burners 26, 27 are mounted atthe front and bridge ,walls of the firebox respectively, discharging their flames through air inlet openings at and b respectively toward the rear of the firebox, as clearly shown in Fig l of the drawings. This disposition of. the burners forms what I consider to be the novel and important feature by this disposition rear portion of the firebox, so that that portion of the boiler that lies adjacent the rear of the firebox will absorb the maximum amount of heat delivered by the flames before the exhaust of the engine could force the gases through the 'fiues to the atmosphere' In Figs. 3 and at of the drawings I have illustrated a modified form of construction which is similar to the first described form in all essential particulars embodying only a change in the box construction. This form of box 27 is provided with a metallic bottoin plate 28, which extends from the rear end of the fire box forwardly to about the middle thereof. A short distance beyond the end of the-plate 28 anotherplate 29' extends forwardly where it is bolted or otherwise secured to a. vertically disposed plate 30 which extends upwardly from plate :29. The plates 28 and 29 are provided with rectangular openings 31, 32, oyer which are mounted perforated ci'ist-ings 32-), 34, the upper face of the castings lying flush with the tops of the fire brick-35, with which the box 27 is preferal'ily lined. Secured to the under face of plates 28 and air inlet boxes 3G, 37, the rear vertical wall of each box being open to the atn'iosphcrc, and each provided with a damper 38, controlled from the cab of the engine in a suitable manner (not shown). The admission of air through the perforated castingsinto the tire box is exactly similar to the hereinbefore descril'ied construction. and. the re sults are essentially the same as in the first described form. Atthe pmcture of plates 29 are sheet metal:

28 and il in the :enter of the fire box, l, have provided a centrally and transversely disposed bridge wall 89 having a pocket 4.0, which opens to the atmosphere at the bottom thereof. Mounted in pocket 40 is a burner 41, which discharges its'flame toward the rear of thefire box through anairinlet opening e 2 formed in one wall of the bridge 39. ,Vertically disposed plate 30is provided with an air inlet opening 43, and mounted on the outside of this plate and adjacent to the opening 43 is a hydrocarbon burner 44: adapted to discharge its flame so as to impinge against one of the walls bf the bridge 39. This construction, while not as efficient as the first described form, forces the heat to therear of the fire box and acconiplishes results that are highly satisfactory.

Having claim as new and Patent is:

l. The combination with a steam boiler having a firebox, provided with a transversely disposed bridge-wall,.of means for delivering hydroc'arboh flames from the front end of the firebox and the bridge-wall toward the rear end of the firebox, means for establishing a draft of air into the firebox adjacent the flame delivery means, a plurality of air admission means for admitting air directly into the firebox under each flame, one of said air admissionmeans for each burner flame, and means located beneath each of said air admission means for controlling the volume of air to said admission means.

The combination with a storm boiler, of a firebox having a refractory lining on its bottom and sides, the bottom-of said firebox being constructed so as to form a transverselydisposedbridge-wall, a plurality of hydrocarbon burners disposed outside of ,said firebox, one at the forward end of the described my invention what I desire to secure by Letters box and the other at the bridgenvall and both delivering the. flames into the firebox toward the rear thereof, means for establishing a draft of air into the firebox adjacent the hydrocarbon burners, a plurality of air inlets in thehottom of said firebox, a met-allic casing having an opening therein disposed under each of said air inlets, a closure I for the opening in each casing, and means to control the closures.

In witness that I claim the foregoing I have hereunto subscribed my name this 27th day of July, 1909.

' C. A..HAl\lMETi.-

lVitnesses:

EDMUND .A. STRAUSE, Mrn'rnn .A. PALMER. 

